#pragma warn -use static char *sccsid = "@(#)TIFF/tif_dir.c 1.64, Copyright (c) Sam Leffler, Dieter Linde, "__DATE__; #pragma warn .use /* * Copyright (c) 1988, 1990 by Sam Leffler, Oct 8 1990 * All rights reserved. * * This file is provided for unrestricted use provided that this legend is included on all tape media and as a part of the * software program in whole or part. Users may copy, modify or distribute this file at will. * * TIFF Library. * * Directory Support Routines. * * NB: Beware of the varargs declarations for routines in this file. The names and types of variables has been * carefully chosen to make things work with compilers that are busted in one way or another (e.g. SGI/MIPS). */ #include #include "tiffio.h" #ifndef TRUE #define TRUE 1 #define FALSE 0 #endif #define howmany(x, y) (((x) + ((y) - 1)) / (y)) #define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y)) #define FieldSet(fields, f) (fields[f / 32] & (1L << (f & 0x1F))) #define ResetFieldBit(fields, f) (fields[f / 32] &= ~(1L << (f & 0x1F))) #define TIFFExtractData(tif, type, v) ((tif)->tif_header.tiff_magic == TIFF_BIGENDIAN ? ((v) >> (tif)->tif_typeshift[type]) & (tif)->tif_typemask[type] : (v) & (tif)->tif_typemask[type]) #define TIFFInsertData(tif, type, v) ((tif)->tif_header.tiff_magic == TIFF_BIGENDIAN ? ((v) & (tif)->tif_typemask[type]) << (tif)->tif_typeshift[type] : (v) & (tif)->tif_typemask[type]) typedef struct { u_short field_tag; /* field's tag */ short field_count; /* write count (-1 for unknown) */ TIFFDataType field_type; /* type of associated data */ u_short field_bit; /* bit in fieldsset bit vector */ u_short field_oktochange; /* if true, can change while writing */ char *field_name; /* ASCII name */ } TIFFFieldInfo; /* * NB: This array is assumed to be sorted by tag. */ static TIFFFieldInfo FieldInfo[] = { { TIFFTAG_SUBFILETYPE, 1, TIFF_LONG, FIELD_SUBFILETYPE, TRUE, "SubfileType" }, #ifdef SUBFILE_COMPAT { TIFFTAG_SUBFILETYPE, 1, TIFF_SHORT, FIELD_SUBFILETYPE, FALSE, "SubfileType" }, #endif /* SUBFILE_COMPAT */ { TIFFTAG_OSUBFILETYPE, 1, TIFF_SHORT, FIELD_SUBFILETYPE, FALSE, "OldSubfileType" }, { TIFFTAG_IMAGEWIDTH, 1, TIFF_SHORT, FIELD_IMAGEDIMENSIONS, FALSE, "ImageWidth" }, { TIFFTAG_IMAGEWIDTH, 1, TIFF_LONG, FIELD_IMAGEDIMENSIONS, FALSE, "ImageWidth" }, { TIFFTAG_IMAGELENGTH, 1, TIFF_SHORT, FIELD_IMAGEDIMENSIONS, TRUE, "ImageLength" }, { TIFFTAG_IMAGELENGTH, 1, TIFF_LONG, FIELD_IMAGEDIMENSIONS, TRUE, "ImageLength" }, { TIFFTAG_BITSPERSAMPLE, -1, TIFF_SHORT, FIELD_BITSPERSAMPLE, FALSE, "BitsPerSample" }, { TIFFTAG_COMPRESSION, 1, TIFF_SHORT, FIELD_COMPRESSION, FALSE, "Compression" }, { TIFFTAG_PHOTOMETRIC, 1, TIFF_SHORT, FIELD_PHOTOMETRIC, TRUE, "PhotometricInterpretation" }, { TIFFTAG_THRESHHOLDING, 1, TIFF_SHORT, FIELD_THRESHHOLDING, TRUE, "Threshholding" }, { TIFFTAG_CELLWIDTH, 1, TIFF_SHORT, (u_short)-1, TRUE, "CellWidth" }, { TIFFTAG_CELLLENGTH, 1, TIFF_SHORT, (u_short)-1, TRUE, "CellLength" }, { TIFFTAG_FILLORDER, 1, TIFF_SHORT, FIELD_FILLORDER, FALSE, "FillOrder" }, { TIFFTAG_DOCUMENTNAME, -1, TIFF_ASCII, FIELD_DOCUMENTNAME, TRUE, "DocumentName" }, { TIFFTAG_IMAGEDESCRIPTION, -1, TIFF_ASCII, FIELD_IMAGEDESCRIPTION, TRUE, "ImageDescription" }, { TIFFTAG_MAKE, -1, TIFF_ASCII, FIELD_MAKE, TRUE, "Make" }, { TIFFTAG_MODEL, -1, TIFF_ASCII, FIELD_MODEL, TRUE, "Model" }, { TIFFTAG_STRIPOFFSETS, -1, TIFF_LONG, FIELD_STRIPOFFSETS, FALSE, "StripOffsets" }, { TIFFTAG_STRIPOFFSETS, -1, TIFF_SHORT, FIELD_STRIPOFFSETS, FALSE, "StripOffsets" }, { TIFFTAG_ORIENTATION, 1, TIFF_SHORT, FIELD_ORIENTATION, TRUE, "Orientation" }, { TIFFTAG_SAMPLESPERPIXEL, 1, TIFF_SHORT, FIELD_SAMPLESPERPIXEL, FALSE, "SamplesPerPixel" }, { TIFFTAG_ROWSPERSTRIP, 1, TIFF_LONG, FIELD_ROWSPERSTRIP, FALSE, "RowsPerStrip" }, { TIFFTAG_ROWSPERSTRIP, 1, TIFF_SHORT, FIELD_ROWSPERSTRIP, FALSE, "RowsPerStrip" }, { TIFFTAG_STRIPBYTECOUNTS, -1, TIFF_LONG, FIELD_STRIPBYTECOUNTS, FALSE, "StripByteCounts" }, { TIFFTAG_STRIPBYTECOUNTS, -1, TIFF_SHORT, FIELD_STRIPBYTECOUNTS, FALSE, "StripByteCounts" }, { TIFFTAG_MINSAMPLEVALUE, -1, TIFF_SHORT, FIELD_MINSAMPLEVALUE, TRUE, "MinSampleValue" }, { TIFFTAG_MAXSAMPLEVALUE, -1, TIFF_SHORT, FIELD_MAXSAMPLEVALUE, TRUE, "MaxSampleValue" }, { TIFFTAG_XRESOLUTION, 1, TIFF_RATIONAL, FIELD_RESOLUTION, TRUE, "XResolution" }, { TIFFTAG_YRESOLUTION, 1, TIFF_RATIONAL, FIELD_RESOLUTION, TRUE, "YResolution" }, { TIFFTAG_PLANARCONFIG, 1, TIFF_SHORT, FIELD_PLANARCONFIG, FALSE, "PlanarConfiguration" }, { TIFFTAG_PAGENAME, -1, TIFF_ASCII, FIELD_PAGENAME, TRUE, "PageName" }, { TIFFTAG_XPOSITION, 1, TIFF_RATIONAL, FIELD_POSITION, TRUE, "XPosition" }, { TIFFTAG_YPOSITION, 1, TIFF_RATIONAL, FIELD_POSITION, TRUE, "YPosition" }, { TIFFTAG_FREEOFFSETS, -1, TIFF_LONG, (u_short)-1, FALSE, "FreeOffsets" }, { TIFFTAG_FREEBYTECOUNTS, -1, TIFF_LONG, (u_short)-1, FALSE, "FreeByteCounts" }, { TIFFTAG_GRAYRESPONSEUNIT, 1, TIFF_SHORT, FIELD_GRAYRESPONSEUNIT, TRUE, "GrayResponseUnit" }, { TIFFTAG_GRAYRESPONSECURVE, -1, TIFF_SHORT, FIELD_GRAYRESPONSECURVE, TRUE, "GrayResponseCurve" }, { TIFFTAG_GROUP3OPTIONS, 1, TIFF_LONG, FIELD_GROUP3OPTIONS, FALSE, "Group3Options" }, { TIFFTAG_GROUP4OPTIONS, 1, TIFF_LONG, FIELD_GROUP4OPTIONS, FALSE, "Group4Options" }, { TIFFTAG_RESOLUTIONUNIT, 1, TIFF_SHORT, FIELD_RESOLUTIONUNIT, TRUE, "ResolutionUnit" }, { TIFFTAG_PAGENUMBER, 2, TIFF_SHORT, FIELD_PAGENUMBER, TRUE, "PageNumber" }, { TIFFTAG_COLORRESPONSEUNIT, 1, TIFF_SHORT, FIELD_COLORRESPONSEUNIT, TRUE, "ColorResponseUnit" }, { TIFFTAG_COLORRESPONSECURVE, -1, TIFF_SHORT, FIELD_COLORRESPONSECURVE, TRUE, "ColorResponseCurve" }, { TIFFTAG_SOFTWARE, -1, TIFF_ASCII, FIELD_SOFTWARE, TRUE, "Software" }, { TIFFTAG_DATETIME, -1, TIFF_ASCII, FIELD_DATETIME, TRUE, "DateTime" }, { TIFFTAG_ARTIST, -1, TIFF_ASCII, FIELD_ARTIST, TRUE, "Artist" }, { TIFFTAG_HOSTCOMPUTER, -1, TIFF_ASCII, FIELD_HOSTCOMPUTER, TRUE, "HostComputer" }, { TIFFTAG_PREDICTOR, 1, TIFF_SHORT, FIELD_PREDICTOR, FALSE, "Predictor" }, { TIFFTAG_WHITEPOINT, 2, TIFF_RATIONAL, (u_short)-1, TRUE, "WhitePoint" }, { TIFFTAG_PRIMARYCHROMATICITIES, 6, TIFF_RATIONAL, (u_short)-1, TRUE, "PrimaryChromaticities" }, { TIFFTAG_COLORMAP, 1, TIFF_SHORT, FIELD_COLORMAP, TRUE, "ColorMap" }, { TIFFTAG_BADFAXLINES, 1, TIFF_LONG, FIELD_BADFAXLINES, TRUE, "BadFaxLines" }, { TIFFTAG_BADFAXLINES, 1, TIFF_SHORT, FIELD_BADFAXLINES, TRUE, "BadFaxLines" }, { TIFFTAG_CLEANFAXDATA, 1, TIFF_SHORT, FIELD_CLEANFAXDATA, TRUE, "CleanFaxData" }, { TIFFTAG_CONSECUTIVEBADFAXLINES, 1, TIFF_LONG, FIELD_BADFAXRUN, TRUE, "ConsecutiveBadFaxLines" }, { TIFFTAG_CONSECUTIVEBADFAXLINES, 1, TIFF_SHORT, FIELD_BADFAXRUN, TRUE, "ConsecutiveBadFaxLines" }, /*** begin nonstandard tags ***/ { TIFFTAG_MATTEING, 1, TIFF_SHORT, FIELD_MATTEING, FALSE, "Matteing" }, }; #define NFIELDINFO (sizeof(FieldInfo) / sizeof(FieldInfo[0])) #define IGNORE 0 /* tag placeholder used below */ static int datawidth[] = { 1, /* nothing */ 1, /* TIFF_BYTE */ 1, /* TIFF_ASCII */ 2, /* TIFF_SHORT */ 4, /* TIFF_LONG */ 8, /* TIFF_RATIONAL */ }; /**************************************************************************** * */ static void TIFFUnpackShorts( TIFF *tif, u_short v[], TIFFDirEntry *dir ) { if (tif->tif_header.tiff_magic == TIFF_BIGENDIAN) { v[0] = dir->tdir_offset >> 16; v[1] = dir->tdir_offset & 0xffff; } else { v[0] = dir->tdir_offset & 0xffff; v[1] = dir->tdir_offset >> 16; } } /**************************************************************************** * */ static TIFFFieldInfo * FindFieldInfo( u_short tag, TIFFDataType dt ) { register TIFFFieldInfo *fip; /*** NB: if table gets big, can use sorted search (e.g. binary search) ***/ for (fip = FieldInfo; fip < &FieldInfo[NFIELDINFO]; fip++) if (fip->field_tag == tag && (dt == (TIFFDataType)0 || fip->field_type == dt)) return(fip); return(NULL); } /**************************************************************************** * */ static TIFFFieldInfo * FieldWithTag( u_short tag ) { TIFFFieldInfo *fip = FindFieldInfo(tag, (TIFFDataType)0); if (fip) return(fip); TIFFError("FieldWithTag", "internal error, unknown tag %u", tag); exit(-1); /*** NOTREACHED ***/ return(NULL); } /**************************************************************************** * Fetch a contiguous directory item. */ static int TIFFFetchData( TIFF *tif, TIFFDirEntry *dir, char *cp ) { int w, cc; w = datawidth[dir->tdir_type]; cc = (int)dir->tdir_count * w; if (SeekOK(tif->tif_fd, dir->tdir_offset) && ReadOK(tif->tif_fd, cp, cc)) { if (tif->tif_flags & TIFF_SWAB) { switch (dir->tdir_type) { case TIFF_SHORT: TIFFSwabArrayOfShort((u_short *)cp, (int)dir->tdir_count); break; case TIFF_LONG: TIFFSwabArrayOfLong((u_long *)cp, (int)dir->tdir_count); break; case TIFF_RATIONAL: TIFFSwabArrayOfLong((u_long *)cp, (int)(dir->tdir_count * 2)); break; } } return(cc); } TIFFError("TIFFFetchData", "error fetching data for field '%s'", FieldWithTag(dir->tdir_tag)->field_name); return(0); } /**************************************************************************** * Fetch an ASCII item from the file. */ static int TIFFFetchString( TIFF *tif, TIFFDirEntry *dir, char *cp ) { if (dir->tdir_count <= 4) { u_long l = dir->tdir_offset; if (tif->tif_flags & TIFF_SWAB) TIFFSwabLong(&l); bcopy(&l, cp, dir->tdir_count); return(1); } return(TIFFFetchData(tif, dir, cp)); } /**************************************************************************** * Fetch a rational item from the file at offset off. We return the value * as floating point number. */ static double TIFFFetchRational( TIFF *tif, TIFFDirEntry *dir ) { long l[2]; if (!TIFFFetchData(tif, dir, (char *)l)) return(1.0); if (l[1] == 0) { TIFFError("TIFFFetchRational", "rational with zero denominator", FieldWithTag(dir->tdir_tag)->field_name); return(1.0); } return((double)l[0] / (double)l[1]); } /**************************************************************************** * */ static int TIFFFetchPerSampleShorts( TIFF *tif, TIFFDirEntry *dir, long *pl ) { u_short v[4]; int i; switch ((int)dir->tdir_count) { case 1: *pl = TIFFExtractData(tif, dir->tdir_type, dir->tdir_offset); return(1); /* XXX should check samplesperpixel */ case 2: TIFFUnpackShorts(tif, v, dir); break; default: if (!TIFFFetchData(tif, dir, (char *)v)) return(0); break; } if (tif->tif_dir.td_samplesperpixel != dir->tdir_count) { TIFFError("TIFFFetchPerSampleShorts", "incorrect count %ld for field '%s'", dir->tdir_count, FieldWithTag(dir->tdir_tag)->field_name); return(0); } for (i = 1; i < dir->tdir_count; i++) if (v[i] != v[0]) { TIFFError("TIFFFetchPerSampleShorts", "can't handle different per-sample values for field '%s'", FieldWithTag(dir->tdir_tag)->field_name); return(0); } *pl = v[0]; return(1); } /**************************************************************************** * */ static int TIFFFetchStripThing( TIFF *tif, TIFFDirEntry *dir, long nstrips, u_long **lpp ) { static char *module = "TIFFFetchStripThing"; register u_long *lp; int status; if (nstrips != dir->tdir_count) { TIFFError(module, "count mismatch for field '%s'; expecting %ld, got %ld", FieldWithTag(dir->tdir_tag)->field_name, nstrips, dir->tdir_count); return(0); } /* * Allocate space for strip information. */ if (*lpp == NULL && (*lpp = (u_long *)malloc(nstrips * sizeof(u_long))) == NULL) { TIFFError(module, "out of memory allocating space for '%s' array", FieldWithTag(dir->tdir_tag)->field_name); return(0); } lp = *lpp; status = 1; if (dir->tdir_type == (int)TIFF_SHORT) { /* * Handle short->long expansion. */ if (dir->tdir_count > 2) { char *dp = malloc(dir->tdir_count * datawidth[(int)TIFF_SHORT]); if (dp == NULL) { TIFFError(module, "out of memory fetching field '%s'", FieldWithTag(dir->tdir_tag)->field_name); return(0); } if ((status = TIFFFetchData(tif, dir, dp)) != 0) { register u_short *wp = (u_short *)dp; while (nstrips-- > 0) *lp++ = *wp++; } free(dp); } else { /* * Extract data from offset field. */ if (tif->tif_header.tiff_magic == TIFF_BIGENDIAN) { *lp++ = (dir->tdir_offset >> 16); *lp = dir->tdir_offset & 0xffff; } else { *lp++ = (dir->tdir_offset & 0xffff); *lp = dir->tdir_offset >> 16; } } } else { if (dir->tdir_count > 1) status = TIFFFetchData(tif, dir, (char *)lp); else *lp = dir->tdir_offset; } return(status); } /**************************************************************************** * */ static void MissingRequired( TIFF *tif, char *tagname ) { TIFFError("TIFFLib", "TIFF directory for file \"%s\" is missing required '%s' field", tif->tif_name, tagname); } /**************************************************************************** * */ static void setString( char **cpp, char *cp ) { if (*cpp) { free(*cpp); *cpp = 0; } if (cp) { size_t len = strlen(cp) + 1; if ((*cpp = malloc(len)) != NULL) bcopy(cp, *cpp, len); } } /**************************************************************************** * */ static void setCurve( u_short **wpp, u_short *wp, long nw ) { if (*wpp) { free(*wpp); *wpp = 0; } nw *= sizeof(u_short); if (wp && ((*wpp = (u_short *)malloc(nw)) != NULL)) bcopy(wp, *wpp, nw); } /**************************************************************************** * Record the value of a field in the internal directory structure. The * field will be written to the file when/if the directory structure is * updated. */ int TIFFSetField( TIFF *tif, u_short tag, ... ) { static char *module = "TIFFSetField"; TIFFDirectory *td = &tif->tif_dir; va_list ap; long v; int field = -1; int status = 1; if (tag != TIFFTAG_IMAGELENGTH && (tif->tif_flags & TIFF_BEENWRITING)) { TIFFFieldInfo *fip = FindFieldInfo(tag, (TIFFDataType)0); /* * Consult info table to see if tag can be changed after we've started writing. We only allow changes * to those tags that don't/shouldn't affect the compression and/or format of the data. */ if (fip && !fip->field_oktochange) { TIFFError(module, "can't modify tag '%s'", fip->field_name); return(0); } } va_start(ap, tag); switch (tag) { case TIFFTAG_SUBFILETYPE: td->td_subfiletype = va_arg(ap, int); field = FIELD_SUBFILETYPE; break; case TIFFTAG_IMAGEWIDTH: td->td_imagewidth = va_arg(ap, int); field = FIELD_IMAGEDIMENSIONS; break; case TIFFTAG_IMAGELENGTH: td->td_imagelength = va_arg(ap, int); field = FIELD_IMAGEDIMENSIONS; break; case TIFFTAG_BITSPERSAMPLE: td->td_bitspersample = va_arg(ap, int); field = FIELD_BITSPERSAMPLE; break; case TIFFTAG_COMPRESSION: v = va_arg(ap, int) & 0xffff; /* * If we're changing the compression scheme, the notify the previous module so that it * can cleanup any state it's setup. */ if (TIFFFieldSet(tif, FIELD_COMPRESSION)) { if (td->td_compression == v) break; if (tif->tif_cleanup) (*tif->tif_cleanup)(tif); } /* * Setup new compression routine state. */ if ((status = TIFFSetCompressionScheme(tif, v)) != 0) { td->td_compression = v; field = FIELD_COMPRESSION; } break; case TIFFTAG_PHOTOMETRIC: td->td_photometric = va_arg(ap, int); field = FIELD_PHOTOMETRIC; break; case TIFFTAG_THRESHHOLDING: td->td_threshholding = va_arg(ap, int); field = FIELD_THRESHHOLDING; break; case TIFFTAG_FILLORDER: td->td_fillorder = va_arg(ap, int); field = FIELD_FILLORDER; break; case TIFFTAG_DOCUMENTNAME: setString(&td->td_documentname, va_arg(ap, char *)); field = FIELD_DOCUMENTNAME; break; case TIFFTAG_ARTIST: setString(&td->td_artist, va_arg(ap, char *)); field = FIELD_ARTIST; break; case TIFFTAG_DATETIME: setString(&td->td_datetime, va_arg(ap, char *)); field = FIELD_DATETIME; break; case TIFFTAG_HOSTCOMPUTER: setString(&td->td_hostcomputer, va_arg(ap, char *)); field = FIELD_HOSTCOMPUTER; break; case TIFFTAG_IMAGEDESCRIPTION: setString(&td->td_imagedescription, va_arg(ap, char *)); field = FIELD_IMAGEDESCRIPTION; break; case TIFFTAG_MAKE: setString(&td->td_make, va_arg(ap, char *)); field = FIELD_MAKE; break; case TIFFTAG_MODEL: setString(&td->td_model, va_arg(ap, char *)); field = FIELD_MODEL; break; case TIFFTAG_SOFTWARE: setString(&td->td_software, va_arg(ap, char *)); field = FIELD_SOFTWARE; break; case TIFFTAG_ORIENTATION: td->td_orientation = va_arg(ap, int); field = FIELD_ORIENTATION; break; case TIFFTAG_SAMPLESPERPIXEL: v = va_arg(ap, int); if (v == 0) goto badvalue; if (v > 4) { TIFFError(module, "can't handle %ld-channel data", v); goto bad; } td->td_samplesperpixel = v; field = FIELD_SAMPLESPERPIXEL; break; case TIFFTAG_ROWSPERSTRIP: v = va_arg(ap, long); if (v == 0) goto badvalue; td->td_rowsperstrip = v; field = FIELD_ROWSPERSTRIP; break; case TIFFTAG_MINSAMPLEVALUE: td->td_minsamplevalue = va_arg(ap, int) & 0xffff; field = FIELD_MINSAMPLEVALUE; break; case TIFFTAG_MAXSAMPLEVALUE: td->td_maxsamplevalue = va_arg(ap, int) & 0xffff; field = FIELD_MAXSAMPLEVALUE; break; case TIFFTAG_XRESOLUTION: td->td_xresolution = va_arg(ap, dblparam_t); field = FIELD_RESOLUTION; break; case TIFFTAG_YRESOLUTION: td->td_yresolution = va_arg(ap, dblparam_t); field = FIELD_RESOLUTION; break; case TIFFTAG_PLANARCONFIG: v = va_arg(ap, int); td->td_planarconfig = v; field = FIELD_PLANARCONFIG; break; case TIFFTAG_PAGENAME: setString(&td->td_pagename, va_arg(ap, char *)); field = FIELD_PAGENAME; break; case TIFFTAG_XPOSITION: td->td_xposition = va_arg(ap, dblparam_t); field = FIELD_POSITION; break; case TIFFTAG_YPOSITION: td->td_yposition = va_arg(ap, dblparam_t); field = FIELD_POSITION; break; case TIFFTAG_GRAYRESPONSEUNIT: td->td_grayresponseunit = va_arg(ap, int); field = FIELD_GRAYRESPONSEUNIT; break; case TIFFTAG_GRAYRESPONSECURVE: setCurve(&td->td_grayresponsecurve, va_arg(ap, u_short *), 1L << td->td_bitspersample); field = FIELD_GRAYRESPONSECURVE; break; case TIFFTAG_GROUP3OPTIONS: td->td_group3options = va_arg(ap, long); field = FIELD_GROUP3OPTIONS; break; case TIFFTAG_GROUP4OPTIONS: td->td_group4options = va_arg(ap, long); field = FIELD_GROUP4OPTIONS; break; case TIFFTAG_RESOLUTIONUNIT: td->td_resolutionunit = va_arg(ap, int); field = FIELD_RESOLUTIONUNIT; break; case TIFFTAG_PAGENUMBER: td->td_pagenumber[0] = va_arg(ap, int); td->td_pagenumber[1] = va_arg(ap, int); field = FIELD_PAGENUMBER; break; case TIFFTAG_COLORRESPONSEUNIT: td->td_colorresponseunit = va_arg(ap, int); field = FIELD_COLORRESPONSEUNIT; break; case TIFFTAG_COLORRESPONSECURVE: v = 1L << td->td_bitspersample; setCurve(&td->td_redresponsecurve, va_arg(ap, u_short *), v); setCurve(&td->td_greenresponsecurve, va_arg(ap, u_short *), v); setCurve(&td->td_blueresponsecurve, va_arg(ap, u_short *), v); field = FIELD_COLORRESPONSECURVE; break; case TIFFTAG_COLORMAP: v = 1L << td->td_bitspersample; setCurve(&td->td_redcolormap, va_arg(ap, u_short *), v); setCurve(&td->td_greencolormap, va_arg(ap, u_short *), v); setCurve(&td->td_bluecolormap, va_arg(ap, u_short *), v); field = FIELD_COLORMAP; break; case TIFFTAG_PREDICTOR: td->td_predictor = va_arg(ap, int); field = FIELD_PREDICTOR; break; case TIFFTAG_MATTEING: td->td_matteing = va_arg(ap, int); field = FIELD_MATTEING; break; case TIFFTAG_BADFAXLINES: td->td_badfaxlines = va_arg(ap, long); field = FIELD_BADFAXLINES; break; case TIFFTAG_CLEANFAXDATA: td->td_cleanfaxdata = va_arg(ap, int); field = FIELD_CLEANFAXDATA; break; case TIFFTAG_CONSECUTIVEBADFAXLINES: td->td_badfaxrun = va_arg(ap, int); field = FIELD_BADFAXRUN; break; } if (field >= 0) { TIFFSetFieldBit(tif, field); tif->tif_flags |= TIFF_DIRTYDIRECT; } va_end(ap); return(status); badvalue: TIFFError(module, "bad value %ld for '%s'", v, FieldWithTag(tag)->field_name); bad: va_end(ap); return(0); } /**************************************************************************** * Setup a default directory structure. */ int TIFFDefaultDirectory( TIFF *tif ) { register TIFFDirectory *td = &tif->tif_dir; bzero(td, sizeof(*td)); td->td_fillorder = FILLORDER_MSB2LSB; td->td_bitspersample = 1; td->td_threshholding = THRESHHOLD_BILEVEL; td->td_orientation = ORIENTATION_TOPLEFT; td->td_samplesperpixel = 1; td->td_predictor = 1; td->td_rowsperstrip = 0xffffffffL; td->td_grayresponseunit = GRAYRESPONSEUNIT_100S; td->td_resolutionunit = RESUNIT_INCH; td->td_colorresponseunit = COLORRESPONSEUNIT_100S; TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_NONE); /* * NB: The directory is marked dirty as a result of setting up the default compression scheme. However, this really * isn't correct -- we want TIFF_DIRTYDIRECT to be set only if the user does something. We could just do the setup * by hand, but it seems better to use the normal mechanism (i.e. TIFFSetField). */ tif->tif_flags &= ~TIFF_DIRTYDIRECT; return(1); } /**************************************************************************** * Read the next TIFF directory from a file and convert it to the internal format. * We read directories sequentially. */ int TIFFReadDirectory( TIFF *tif ) { static char *module = "TIFFReadDirectory"; register TIFFDirEntry *dp; register int n; register TIFFDirectory *td = NULL; TIFFDirEntry *dir = NULL; long v; TIFFFieldInfo *fip; u_short dircount; char *cp; int diroutoforderwarning = 0; int ok; tif->tif_diroff = tif->tif_nextdiroff; if (tif->tif_diroff == 0) /* no more directories */ return(0); if (!SeekOK(tif->tif_fd, tif->tif_diroff)) { TIFFError(module, "seek error accessing TIFF directory"); return(0); } if (!ReadOK(tif->tif_fd, &dircount, sizeof(short))) { TIFFError(module, "can't read TIFF directory count"); return(0); } if (tif->tif_flags & TIFF_SWAB) TIFFSwabShort(&dircount); if ((dir = (TIFFDirEntry *)malloc((long)dircount * sizeof(TIFFDirEntry))) == NULL) { TIFFError(module, "out of memory reading TIFF directory"); return(0); } if (!ReadOK(tif->tif_fd, dir, (long)dircount * sizeof(TIFFDirEntry))) { TIFFError(module, "can't read TIFF directory"); goto bad; } /* * Read offset to next directory for sequential scans. */ if (!ReadOK(tif->tif_fd, &tif->tif_nextdiroff, sizeof(long))) tif->tif_nextdiroff = 0; if (tif->tif_flags & TIFF_SWAB) TIFFSwabLong((u_long *)&tif->tif_nextdiroff); tif->tif_flags &= ~TIFF_BEENWRITING; /* reset before new dir */ /* * Setup default value and then make a pass over the fields to check type and tag information, * and to extract info required to size data structures. A second pass is made afterwards * to read in everthing not taken in the first pass. */ td = &tif->tif_dir; if (tif->tif_diroff != tif->tif_header.tiff_diroff) { /*** free any old stuff and reinit ***/ TIFFFreeDirectory(tif); } TIFFDefaultDirectory(tif); /* * Electronic Arts writes gray-scale TIFF files without a PlanarConfiguration directory entry. * Thus we setup a default value here, even though the TIFF spec says there is no default value. */ TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG); for (fip = FieldInfo, dp = dir, n = dircount; n > 0; n--, dp++) { if (tif->tif_flags & TIFF_SWAB) { TIFFSwabArrayOfShort(&dp->tdir_tag, 2); TIFFSwabArrayOfLong(&dp->tdir_count, 2); } /* * Find the field information entry for this tag. * * Silicon Beach (at least) writes unordered directory tags (violating the spec). Handle * it here, but be obnoxious (maybe they'll fix it?). */ if (dp->tdir_tag < fip->field_tag) { if (!diroutoforderwarning) { TIFFWarning(tif->tif_name, "Invalid TIFF directory; tags are not sorted in ascending order"); diroutoforderwarning = 1; } fip = FieldInfo; /* O(n^2) */ } while (fip < &FieldInfo[NFIELDINFO] && fip->field_tag < dp->tdir_tag) fip++; if (fip >= &FieldInfo[NFIELDINFO] || fip->field_tag != dp->tdir_tag) { TIFFWarning(tif->tif_name, "ignoring unknown field with tag %u (0x%x)", dp->tdir_tag, dp->tdir_tag); dp->tdir_tag = IGNORE; fip = FieldInfo; /* restart search */ continue; } /* * Null out old tags that we ignore. */ if (fip->field_bit == (u_short)-1) { dp->tdir_tag = IGNORE; continue; } /* * Check data type. */ while ((TIFFDataType)dp->tdir_type != fip->field_type) { fip++; if (fip >= &FieldInfo[NFIELDINFO] || fip->field_tag != dp->tdir_tag) { TIFFError(module, "wrong data type %u for field '%s'", dp->tdir_type, fip[-1].field_name); goto bad; } } switch (dp->tdir_tag) { case TIFFTAG_STRIPOFFSETS: case TIFFTAG_STRIPBYTECOUNTS: TIFFSetFieldBit(tif, fip->field_bit); break; case TIFFTAG_IMAGELENGTH: case TIFFTAG_PLANARCONFIG: case TIFFTAG_SAMPLESPERPIXEL: if (!TIFFSetField(tif, dp->tdir_tag, (int)TIFFExtractData(tif, dp->tdir_type, dp->tdir_offset))) goto bad; break; case TIFFTAG_ROWSPERSTRIP: if (!TIFFSetField(tif, dp->tdir_tag, (long)TIFFExtractData(tif, dp->tdir_type, dp->tdir_offset))) goto bad; break; } } /* * Allocate directory structure and setup defaults. */ if (!TIFFFieldSet(tif, FIELD_IMAGEDIMENSIONS)) { MissingRequired(tif, "ImageLength"); goto bad; } if (!TIFFFieldSet(tif, FIELD_PLANARCONFIG)) { MissingRequired(tif, "PlanarConfiguration"); goto bad; } td->td_stripsperimage = (td->td_rowsperstrip == 0xffffffffL ? (td->td_imagelength != 0 ? 1 : 0) : howmany(td->td_imagelength, td->td_rowsperstrip)); td->td_nstrips = td->td_stripsperimage; if (td->td_planarconfig == PLANARCONFIG_SEPARATE) td->td_nstrips *= td->td_samplesperpixel; if (td->td_nstrips > 0 && !TIFFFieldSet(tif, FIELD_STRIPOFFSETS)) { MissingRequired(tif, "StripOffsets"); goto bad; } /* * Second pass: extract other information. * * Should do a better job of verifying values. */ for (dp = dir, n = dircount; n > 0; n--, dp++) { if (dp->tdir_tag == IGNORE) continue; if (dp->tdir_type == TIFF_ASCII) { if (dp->tdir_count > 0) { if ((cp = malloc(dp->tdir_count)) == NULL) goto bad; ok = (TIFFFetchString(tif, dp, cp) && TIFFSetField(tif, dp->tdir_tag, cp)); free(cp); if (!ok) goto bad; } continue; } if (dp->tdir_type == TIFF_RATIONAL) { if (!TIFFSetField(tif, dp->tdir_tag, TIFFFetchRational(tif, dp))) goto bad; continue; } switch (dp->tdir_tag) { case TIFFTAG_COMPRESSION: /* * The 5.0 spec says the compression tag has one value, while earlier specs say it has * one value per sample. Because of this, we accept the tag if one value is supplied. */ if (dp->tdir_count == 1) { v = TIFFExtractData(tif, dp->tdir_type, dp->tdir_offset); if (!TIFFSetField(tif, TIFFTAG_COMPRESSION, (int)v)) goto bad; break; } /*** fall thru... ***/ case TIFFTAG_MINSAMPLEVALUE: case TIFFTAG_MAXSAMPLEVALUE: case TIFFTAG_BITSPERSAMPLE: if (!TIFFFetchPerSampleShorts(tif, dp, &v) || !TIFFSetField(tif, dp->tdir_tag, (int)v)) goto bad; break; case TIFFTAG_STRIPOFFSETS: if (!TIFFFetchStripThing(tif, dp, td->td_nstrips, &td->td_stripoffset)) goto bad; TIFFSetFieldBit(tif, FIELD_STRIPOFFSETS); break; case TIFFTAG_STRIPBYTECOUNTS: if (!TIFFFetchStripThing(tif, dp, td->td_nstrips, &td->td_stripbytecount)) goto bad; TIFFSetFieldBit(tif, FIELD_STRIPBYTECOUNTS); break; case TIFFTAG_IMAGELENGTH: case TIFFTAG_ROWSPERSTRIP: case TIFFTAG_SAMPLESPERPIXEL: case TIFFTAG_PLANARCONFIG: /*** handled in first pass above ***/ break; case TIFFTAG_GRAYRESPONSECURVE: case TIFFTAG_COLORRESPONSECURVE: case TIFFTAG_COLORMAP: v = (1L << td->td_bitspersample) * sizeof(u_short); if ((cp = malloc(dp->tdir_tag == TIFFTAG_GRAYRESPONSECURVE ? v : v * 3)) == NULL) goto bad; ok = (TIFFFetchData(tif, dp, cp) && TIFFSetField(tif, dp->tdir_tag, cp, cp + v, cp + 2 * v)); free(cp); if (!ok) goto bad; break; case TIFFTAG_PAGENUMBER: TIFFUnpackShorts(tif, td->td_pagenumber, dp); TIFFSetFieldBit(tif, FIELD_PAGENUMBER); break; /* * BEGIN REV 4.0 COMPATIBILITY */ case TIFFTAG_OSUBFILETYPE: v = 0; switch ((int)TIFFExtractData(tif, dp->tdir_type, dp->tdir_offset)) { case OFILETYPE_REDUCEDIMAGE: v = FILETYPE_REDUCEDIMAGE; break; case OFILETYPE_PAGE: v = FILETYPE_PAGE; break; } if (!TIFFSetField(tif, dp->tdir_tag, (int)v)) goto bad; break; /* * END REV 4.0 COMPATIBILITY */ default: if (!TIFFSetField(tif, dp->tdir_tag, (int)TIFFExtractData(tif, dp->tdir_type, dp->tdir_offset))) goto bad; break; } } if (td->td_nstrips > 0 && !TIFFFieldSet(tif, FIELD_STRIPBYTECOUNTS)) { /* * Some manufacturers violate the spec by not giving the size of the strips. In this case, assume there * is one uncompressed strip of data. */ if (td->td_nstrips > 1) { MissingRequired(tif, "StripByteCounts"); goto bad; } TIFFWarning(tif->tif_name, "TIFF directory is missing required \"%s\" field, calculating from imagelength", FieldWithTag(TIFFTAG_STRIPBYTECOUNTS)->field_name); td->td_stripbytecount = (u_long *)malloc(sizeof(u_long)); if (td->td_compression != COMPRESSION_NONE) { u_long space = sizeof(TIFFHeader) + sizeof(short) + ((long)dircount * sizeof(TIFFDirEntry)) + sizeof(long); /* calculate amount of space used by indirect values */ for (dp = dir, n = dircount; n > 0; n--, dp++) { int cc = (int)dp->tdir_count * datawidth[dp->tdir_type]; if (cc > sizeof(long)) space += cc; } td->td_stripbytecount[0] = TIFFGetFileSize(tif->tif_fd) - space; } else { u_long rowbytes; rowbytes = howmany(td->td_bitspersample * td->td_samplesperpixel * td->td_imagewidth, 8); td->td_stripbytecount[0] = td->td_imagelength * rowbytes; } TIFFSetFieldBit(tif, FIELD_STRIPBYTECOUNTS); if (!TIFFFieldSet(tif, FIELD_ROWSPERSTRIP)) td->td_rowsperstrip = td->td_imagelength; } if (dir) free(dir); if (!TIFFFieldSet(tif, FIELD_MAXSAMPLEVALUE)) td->td_maxsamplevalue = (1L << td->td_bitspersample) - 1; /* * Setup default compression scheme. */ if (!TIFFFieldSet(tif, FIELD_COMPRESSION)) TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_NONE); /* * Reinitialize i/o since we are starting on a new directory. */ tif->tif_row = -1; tif->tif_curstrip = -1; tif->tif_scanlinesize = TIFFScanlineSize(tif); return(1); bad: if (dir) free(dir); return(0); } #define CleanupField(field, member) { \ if (TIFFFieldSet(tif, field)) { \ free((char *)td->member); \ td->member = 0; \ } \ } /**************************************************************************** * */ void TIFFFreeDirectory( TIFF *tif ) { register TIFFDirectory *td = &tif->tif_dir; CleanupField(FIELD_GRAYRESPONSECURVE, td_grayresponsecurve); if (TIFFFieldSet(tif, FIELD_COLORRESPONSECURVE)) { free(td->td_redresponsecurve); td->td_redresponsecurve = 0; free(td->td_greenresponsecurve); td->td_greenresponsecurve = 0; free(td->td_blueresponsecurve); td->td_blueresponsecurve = 0; } if (TIFFFieldSet(tif, FIELD_COLORMAP)) { free(td->td_redcolormap); td->td_redcolormap = 0; free(td->td_greencolormap); td->td_greencolormap = 0; free(td->td_bluecolormap); td->td_bluecolormap = 0; } CleanupField(FIELD_DOCUMENTNAME, td_documentname); CleanupField(FIELD_ARTIST, td_artist); CleanupField(FIELD_DATETIME, td_datetime); CleanupField(FIELD_HOSTCOMPUTER, td_hostcomputer); CleanupField(FIELD_IMAGEDESCRIPTION, td_imagedescription); CleanupField(FIELD_MAKE, td_make); CleanupField(FIELD_MODEL, td_model); CleanupField(FIELD_SOFTWARE, td_software); CleanupField(FIELD_PAGENAME, td_pagename); if (td->td_stripoffset) { free((char *)td->td_stripoffset); td->td_stripoffset = NULL; } if (td->td_stripbytecount) { free((char *)td->td_stripbytecount); td->td_stripbytecount = NULL; } } #undef CleanupField /**************************************************************************** * */ static void TIFFGetField1( TIFFDirectory *td, u_short tag, va_list ap ) { switch (tag) { case TIFFTAG_SUBFILETYPE: *va_arg(ap, u_long *) = td->td_subfiletype; break; case TIFFTAG_IMAGEWIDTH: *va_arg(ap, u_short *) = td->td_imagewidth; break; case TIFFTAG_IMAGELENGTH: *va_arg(ap, u_short *) = td->td_imagelength; break; case TIFFTAG_BITSPERSAMPLE: *va_arg(ap, u_short *) = td->td_bitspersample; break; case TIFFTAG_COMPRESSION: *va_arg(ap, u_short *) = td->td_compression; break; case TIFFTAG_PHOTOMETRIC: *va_arg(ap, u_short *) = td->td_photometric; break; case TIFFTAG_THRESHHOLDING: *va_arg(ap, u_short *) = td->td_threshholding; break; case TIFFTAG_FILLORDER: *va_arg(ap, u_short *) = td->td_fillorder; break; case TIFFTAG_DOCUMENTNAME: *va_arg(ap, char **) = td->td_documentname; break; case TIFFTAG_ARTIST: *va_arg(ap, char **) = td->td_artist; break; case TIFFTAG_DATETIME: *va_arg(ap, char **) = td->td_datetime; break; case TIFFTAG_HOSTCOMPUTER: *va_arg(ap, char **) = td->td_hostcomputer; break; case TIFFTAG_IMAGEDESCRIPTION: *va_arg(ap, char **) = td->td_imagedescription; break; case TIFFTAG_MAKE: *va_arg(ap, char **) = td->td_make; break; case TIFFTAG_MODEL: *va_arg(ap, char **) = td->td_model; break; case TIFFTAG_SOFTWARE: *va_arg(ap, char **) = td->td_software; break; case TIFFTAG_ORIENTATION: *va_arg(ap, u_short *) = td->td_orientation; break; case TIFFTAG_SAMPLESPERPIXEL: *va_arg(ap, u_short *) = td->td_samplesperpixel; break; case TIFFTAG_ROWSPERSTRIP: *va_arg(ap, u_long *) = td->td_rowsperstrip; break; case TIFFTAG_MINSAMPLEVALUE: *va_arg(ap, u_short *) = td->td_minsamplevalue; break; case TIFFTAG_MAXSAMPLEVALUE: *va_arg(ap, u_short *) = td->td_maxsamplevalue; break; case TIFFTAG_XRESOLUTION: *va_arg(ap, float *) = td->td_xresolution; break; case TIFFTAG_YRESOLUTION: *va_arg(ap, float *) = td->td_yresolution; break; case TIFFTAG_PLANARCONFIG: *va_arg(ap, u_short *) = td->td_planarconfig; break; case TIFFTAG_XPOSITION: *va_arg(ap, float *) = td->td_xposition; break; case TIFFTAG_YPOSITION: *va_arg(ap, float *) = td->td_yposition; break; case TIFFTAG_PAGENAME: *va_arg(ap, char **) = td->td_pagename; break; case TIFFTAG_GRAYRESPONSEUNIT: *va_arg(ap, u_short *) = td->td_grayresponseunit; break; case TIFFTAG_GRAYRESPONSECURVE: *va_arg(ap, u_short **) = td->td_grayresponsecurve; break; case TIFFTAG_GROUP3OPTIONS: *va_arg(ap, u_long *) = td->td_group3options; break; case TIFFTAG_GROUP4OPTIONS: *va_arg(ap, u_long *) = td->td_group4options; break; case TIFFTAG_RESOLUTIONUNIT: *va_arg(ap, u_short *) = td->td_resolutionunit; break; case TIFFTAG_PAGENUMBER: *va_arg(ap, u_short *) = td->td_pagenumber[0]; *va_arg(ap, u_short *) = td->td_pagenumber[1]; break; case TIFFTAG_COLORRESPONSEUNIT: *va_arg(ap, u_short *) = td->td_colorresponseunit; break; case TIFFTAG_COLORRESPONSECURVE: *va_arg(ap, u_short **) = td->td_redresponsecurve; *va_arg(ap, u_short **) = td->td_greenresponsecurve; *va_arg(ap, u_short **) = td->td_blueresponsecurve; break; case TIFFTAG_COLORMAP: *va_arg(ap, u_short **) = td->td_redcolormap; *va_arg(ap, u_short **) = td->td_greencolormap; *va_arg(ap, u_short **) = td->td_bluecolormap; break; case TIFFTAG_PREDICTOR: *va_arg(ap, u_short *) = td->td_predictor; break; case TIFFTAG_STRIPOFFSETS: *va_arg(ap, u_long **) = td->td_stripoffset; break; case TIFFTAG_STRIPBYTECOUNTS: *va_arg(ap, u_long **) = td->td_stripbytecount; break; case TIFFTAG_MATTEING: *va_arg(ap, u_short *) = td->td_matteing; break; case TIFFTAG_BADFAXLINES: *va_arg(ap, u_long *) = td->td_badfaxlines; break; case TIFFTAG_CLEANFAXDATA: *va_arg(ap, u_short *) = td->td_cleanfaxdata; break; case TIFFTAG_CONSECUTIVEBADFAXLINES: *va_arg(ap, u_long *) = td->td_badfaxrun; break; } va_end(ap); } /**************************************************************************** * Return the value of a field in the internal directory structure. */ int TIFFGetField( TIFF *tif, u_short tag, ... ) { static char *module = "TIFFGetField"; TIFFFieldInfo *fip = FindFieldInfo(tag, (TIFFDataType)0); if (!fip) TIFFError(module, "unknown field, tag %u", tag); else if (TIFFFieldSet(tif, fip->field_bit)) { va_list ap; va_start(ap, tag); TIFFGetField1(&tif->tif_dir, tag, ap); va_end(ap); return(1); } return(0); } /**************************************************************************** * Internal interface to TIFFGetField... */ static void TIFFgetfield( TIFFDirectory *td, u_short tag, ... ) { va_list ap; va_start(ap, tag); TIFFGetField1(td, tag, ap); va_end(ap); } /**************************************************************************** * Link the current directory into the directory chain for the file. */ static int TIFFLinkDirectory( register TIFF *tif ) { static char *module = "TIFFLinkDirectory"; u_short dircount; long nextdir; tif->tif_diroff = (lseek(tif->tif_fd, 0L, L_XTND) + 1) &~ 1L; if (tif->tif_header.tiff_diroff == 0) { /* * First directory, overwrite header. */ tif->tif_header.tiff_diroff = tif->tif_diroff; lseek(tif->tif_fd, 0, L_SET); if (!WriteOK(tif->tif_fd, &tif->tif_header, sizeof(tif->tif_header))) { TIFFError(module, "error writing TIFF header"); return(0); } return(1); } /* * Not the first directory, search to the last and append. */ nextdir = tif->tif_header.tiff_diroff; do { if (!SeekOK(tif->tif_fd, nextdir) || !ReadOK(tif->tif_fd, &dircount, sizeof(dircount))) { TIFFError(module, "error fetching directory count"); return(0); } if (tif->tif_flags & TIFF_SWAB) TIFFSwabShort(&dircount); lseek(tif->tif_fd, dircount * sizeof(TIFFDirEntry), L_INCR); if (!ReadOK(tif->tif_fd, &nextdir, sizeof(nextdir))) { TIFFError(module, "error fetching directory link"); return(0); } if (tif->tif_flags & TIFF_SWAB) TIFFSwabLong((u_long *)&nextdir); } while (nextdir != 0); lseek(tif->tif_fd, -sizeof(nextdir), L_INCR); if (!WriteOK(tif->tif_fd, &tif->tif_diroff, sizeof(tif->tif_diroff))) { TIFFError(module, "error writing directory link"); return(0); } return(1); } static long dataoff = 0; /**************************************************************************** * Write a contiguous directory item. */ static int TIFFWriteData( TIFF *tif, TIFFDirEntry *dir, char *cp ) { static char *module = "TIFFWriteData"; u_long cc; dir->tdir_offset = dataoff; cc = dir->tdir_count * (long)datawidth[dir->tdir_type]; if (SeekOK(tif->tif_fd, dir->tdir_offset) && WriteOK(tif->tif_fd, cp, cc)) { dataoff += ((cc + 1) & ~1); return(1); } TIFFError(module, "error writing data for field '%s'", FieldWithTag(dir->tdir_tag)->field_name); return(0); } /**************************************************************************** * */ static int TIFFWriteStripThing( TIFF *tif, u_short tag, TIFFDirEntry *dir, u_long *lp ) { dir->tdir_tag = tag; dir->tdir_type = (short)TIFF_LONG; /* XXX */ dir->tdir_count = tif->tif_dir.td_nstrips; if (dir->tdir_count > 1) return(TIFFWriteData(tif, dir, (char *)lp)); dir->tdir_offset = *lp; return(1); } /**************************************************************************** * */ static int TIFFWriteRational( TIFF *tif, u_short tag, TIFFDirEntry *dir, float v ) { long t[2]; dir->tdir_tag = tag; dir->tdir_type = (short)TIFF_RATIONAL; dir->tdir_count = 1; /*** need algorithm to convert ... XXX ***/ t[0] = v * 10000.0; t[1] = 10000; return(TIFFWriteData(tif, dir, (char *)t)); } /**************************************************************************** * */ static int TIFFWritePerSampleShorts( TIFF *tif, u_short tag, TIFFDirEntry *dir, short v ) { short w[4]; int i; int samplesperpixel = tif->tif_dir.td_samplesperpixel; dir->tdir_tag = tag; dir->tdir_type = (short)TIFF_SHORT; dir->tdir_count = samplesperpixel; if (samplesperpixel <= 2) { if (tif->tif_header.tiff_magic == TIFF_BIGENDIAN) { dir->tdir_offset = (long)v << 16; if (samplesperpixel == 2) dir->tdir_offset |= (v & 0xffff); } else { dir->tdir_offset = v & 0xffff; if (samplesperpixel == 2) dir->tdir_offset |= ((long)v << 16); } return(1); } for (i = 0; i < samplesperpixel; i++) w[i] = v; return(TIFFWriteData(tif, dir, (char *)w)); } /* * Shorthands for setting up and writing directory... */ #define MakeShortDirent(tag, v) dir->tdir_tag = tag; \ dir->tdir_type = (short)TIFF_SHORT; \ dir->tdir_count = 1; \ dir->tdir_offset = TIFFInsertData(tif, (int)TIFF_SHORT, v); \ dir++ #define WriteRationalPair(tag1, v1, tag2, v2) (TIFFWriteRational(tif, tag1, dir++, v1) && TIFFWriteRational(tif, tag2, dir++, v2)) /**************************************************************************** * Write the contents of the current directory to the specified file. This routine doesn't * handle overwriting a directory with auxiliary storage that's been changed. */ int TIFFWriteDirectory( TIFF *tif ) { static char *module = "TIFFWriteDirectory"; short dircount, v; long nfields, dirsize; char *data, *cp; TIFFFieldInfo *fip; TIFFDirEntry *dir; TIFFDirectory *td; u_long b, off; u_long fields[sizeof(td->td_fieldsset) / sizeof(u_long)]; if (tif->tif_mode == O_RDONLY) return(1); if (tif->tif_rawcc > 0 && !TIFFFlushData(tif)) { TIFFError(module, "error flushing data before directory write"); return(0); } /* * Clear write state so that subsequent images with different characteristics get the right buffers * setup for them. */ if (tif->tif_close) (*tif->tif_close)(tif); if (tif->tif_cleanup) (*tif->tif_cleanup)(tif); if (tif->tif_rawdata) { free(tif->tif_rawdata); tif->tif_rawdata = NULL; tif->tif_rawcc = 0; } tif->tif_flags &= ~(TIFF_BEENWRITING | TIFF_BUFFERSETUP); td = &tif->tif_dir; /* * Size the directory so that we can calculate offsets for the data items that aren't kept * in-place in each field. */ nfields = 0; for (b = 0; b <= FIELD_LAST; b++) if (TIFFFieldSet(tif, b)) nfields += (b < FIELD_SUBFILETYPE ? 2 : 1); dirsize = nfields * sizeof(TIFFDirEntry); if ((data = malloc(dirsize)) == NULL) { TIFFError(module, "out of memory writing directory"); return(0); } /* * Directory hasn't been placed yet, put it at the end of the file and link it * into the existing directory structure. */ if (tif->tif_diroff == 0 && !TIFFLinkDirectory(tif)) return(0); dataoff = tif->tif_diroff + sizeof(short) + dirsize + sizeof(long); if (dataoff & 1L) dataoff++; lseek(tif->tif_fd, dataoff, L_SET); dir = (TIFFDirEntry *)data; /* * Setup external form of directory entries and write data items. */ bcopy(td->td_fieldsset, fields, sizeof(fields)); for (fip = FieldInfo; fip < &FieldInfo[NFIELDINFO]; fip++) { if (fip->field_bit == (u_short)-1 || !FieldSet(fields, fip->field_bit)) continue; if (fip->field_type == TIFF_ASCII) { TIFFgetfield(td, fip->field_tag, &cp); dir->tdir_tag = fip->field_tag; dir->tdir_type = TIFF_ASCII; #if 0 /* LIN### */ dir->tdir_count = strlen(cp) + 1; if (!TIFFWriteData(tif, dir++, cp)) goto bad; #else /* LIN### */ if ((dir->tdir_count = strlen(cp) + 1) > 4) { if (!TIFFWriteData(tif, dir, cp)) goto bad; } else bcopy(cp, &dir->tdir_offset, dir->tdir_count); dir++; #endif /* LIN### */ ResetFieldBit(fields, fip->field_bit); continue; } switch (fip->field_bit) { case FIELD_STRIPOFFSETS: case FIELD_STRIPBYTECOUNTS: if (!TIFFWriteStripThing(tif, fip->field_tag, dir++, fip->field_bit == FIELD_STRIPOFFSETS ? td->td_stripoffset : td->td_stripbytecount)) goto bad; break; case FIELD_GRAYRESPONSECURVE: dir->tdir_tag = fip->field_tag; dir->tdir_type = (short)TIFF_SHORT; dir->tdir_count = 1L << td->td_bitspersample; #define WRITE(x) TIFFWriteData(tif, dir, (char *)x) if (!WRITE(td->td_grayresponsecurve)) goto bad; dir++; break; case FIELD_COLORRESPONSECURVE: case FIELD_COLORMAP: dir->tdir_tag = fip->field_tag; dir->tdir_type = (short)TIFF_SHORT; /*** XXX -- yech, fool TIFFWriteData ***/ dir->tdir_count = 1L << td->td_bitspersample; off = dataoff; if (fip->field_tag == TIFFTAG_COLORMAP) { if (!WRITE(td->td_redcolormap) || !WRITE(td->td_greencolormap) || !WRITE(td->td_bluecolormap)) goto bad; } else { if (!WRITE(td->td_redresponsecurve) || !WRITE(td->td_greenresponsecurve) || !WRITE(td->td_blueresponsecurve)) goto bad; } #undef WRITE dir->tdir_count *= 3L; dir->tdir_offset = off; dir++; break; case FIELD_IMAGEDIMENSIONS: MakeShortDirent(TIFFTAG_IMAGEWIDTH, td->td_imagewidth); MakeShortDirent(TIFFTAG_IMAGELENGTH,td->td_imagelength); break; case FIELD_POSITION: if (!WriteRationalPair(TIFFTAG_XPOSITION, td->td_xposition, TIFFTAG_YPOSITION, td->td_yposition)) goto bad; break; case FIELD_RESOLUTION: if (!WriteRationalPair(TIFFTAG_XRESOLUTION, td->td_xresolution, TIFFTAG_YRESOLUTION, td->td_yresolution)) goto bad; break; case FIELD_BITSPERSAMPLE: case FIELD_MINSAMPLEVALUE: case FIELD_MAXSAMPLEVALUE: TIFFgetfield(td, fip->field_tag, &v); if (!TIFFWritePerSampleShorts(tif, fip->field_tag, dir++, v)) goto bad; break; case FIELD_PAGENUMBER: { short v1, v2; dir->tdir_tag = TIFFTAG_PAGENUMBER; dir->tdir_type = (short)TIFF_SHORT; dir->tdir_count = 2; TIFFgetfield(td, TIFFTAG_PAGENUMBER, &v1, &v2); if (tif->tif_header.tiff_magic == TIFF_BIGENDIAN) dir->tdir_offset = (v1 << 16) | (v2 & 0xffff); else dir->tdir_offset = (v2 << 16) | (v1 & 0xffff); dir++; break; } default: dir->tdir_tag = fip->field_tag; dir->tdir_type = fip->field_type; dir->tdir_count = fip->field_count; if (fip->field_type == TIFF_SHORT) { TIFFgetfield(td, fip->field_tag, &v); dir->tdir_offset = TIFFInsertData(tif, dir->tdir_type, v); } else TIFFgetfield(td, fip->field_tag, &dir->tdir_offset); dir++; break; } ResetFieldBit(fields, fip->field_bit); } /* * Write directory. */ lseek(tif->tif_fd, tif->tif_diroff, L_SET); dircount = nfields; if (!WriteOK(tif->tif_fd, &dircount, sizeof(short))) { TIFFError(module, "error writing directory count"); goto bad; } if (!WriteOK(tif->tif_fd, data, dirsize)) { TIFFError(module, "error writing directory contents"); goto bad; } if (!WriteOK(tif->tif_fd, &tif->tif_nextdiroff, sizeof(long))) { TIFFError(module, "error writing directory link"); goto bad; } TIFFFreeDirectory(tif); free(data); tif->tif_flags &= ~TIFF_DIRTYDIRECT; /* * Reset directory-related state for subsequent directories. */ TIFFDefaultDirectory(tif); tif->tif_diroff = 0; tif->tif_curoff = 0; tif->tif_row = -1; tif->tif_curstrip = -1; return(1); bad: free(data); return(0); } #undef MakeShortDirent #undef WriteRationalPair /**************************************************************************** * Set the n-th directory as the current directory. * NB: Directories are numbered starting at 0. */ int TIFFSetDirectory( register TIFF *tif, int n ) { static char *module = "TIFFSetDirectory"; u_short dircount; long nextdir; nextdir = tif->tif_header.tiff_diroff; while (n-- > 0 && nextdir != 0) { if (!SeekOK(tif->tif_fd, nextdir) || !ReadOK(tif->tif_fd, &dircount, sizeof(dircount))) { TIFFError(module, "error fetching directory count"); return(0); } if (tif->tif_flags & TIFF_SWAB) TIFFSwabShort(&dircount); lseek(tif->tif_fd, (long)dircount * sizeof(TIFFDirEntry), L_INCR); if (!ReadOK(tif->tif_fd, &nextdir, sizeof(nextdir))) { TIFFError(module, "error fetching directory link"); return(0); } if (tif->tif_flags & TIFF_SWAB) TIFFSwabLong((u_long *)&nextdir); } tif->tif_nextdiroff = nextdir; return(TIFFReadDirectory(tif)); }